Fabric impervious to petroleum hydrocarbon vapors



Patented Dec. 22, 1925.

UNITED STATES PATENT OFFICE.

ROBERT E. WILSON, OF CHICAGO, ILLINOIS, AND EUGENE P. BROWN, OF WRITING, INDIANA, ASSIGNORS TO STANDARD OIL COMPANY, OF WRITING, INDIANA, A

CORPORATION OF INDIANA.

FABRIC IMPERVIOUS TO PETROLEUM HYDROCARBON VAPORS.

No Drawing.

To all whom it may concern:

Be it known that we, ROBERT E. lVILsoN 'and EUGENE P. BROWN, citizens of the United States, residing at Chicago and \Vhiting, respecth-ely. in the counties of Cook and Lake and States of Illinois and "Indiana, have invented new and useful Improvements in Fabrics Impervious to Petroleum Hydrocarbon Vapors, of which the following is a specification.

This invention relates to fabrics substantially impervious to gasoline and oil and to thin vapors. and more particularly to such fabrics suitable for use in preventing evaporation from storage tanks, for example. as described inthe applications of one ofus filed May 4, 1923, Serial Nos. 636,589 and 636,590. I

In accordance with this invention a suitable fabric, preferably a closely woven, light fabric such as that commonly known as balloon silk is given a continuous coating on one or both sides with an aqueous solution of high grade glue or gelatine and glycerine, together with a small proportion of any suitable preserving agent, for example, 0.1% of FesO 'lH O. The proportions of glue and glycerine may vary; thus 1 to 3 parts of glycol-inc (by Weight) may be used for each part of glue.v We have found a mixture containing 2 parts glvcerine to 1 part of glue excellent in use. Sufficient water is employed in making the solution to produce a liquid readily applied under the conditions of use; for example, 2 to 4 parts of water may be employed. The liquid, which gels at normal temperatures, is 'ap' plied hot, say at 150 to.190 F., by hand 0 any suitable coating device or machine. The resulting coating, after evaporation of the solvent, retains a certain amount of water in'an equilibrium mixture dependent upon. the moisture of the atmosphere, for example, the residual coating formed with 1 part of glue and 2 parts of glycerine contains'about 1 part of Water. Sufiicient of the coating material is applied to provide a continuous --film or coating on the fabric, say from 5 to 20 oz. of the final coating material per square yard of a-fairly close woven fabric such as balloon silk.

The coated fabric... after evaporation of superfluous solvent, isthen dustedwitha Application filed June 27, 1923. Serial No. 648,161.

finely powdered inert solid, such as talc, the non-adherent talc or other solid being removed by any suitable method. for example, by shaking, light brushing or blowing. The coating of solid matter or talc prevents stickiness or tackiness of the coated fabric and. materially facilitates its utilization.

lVe claim:

1. The method of preparing a fabric impervious to the vapors of, petroleum oil products which consists inapplying to a textile fabric a continuous coating of a mixture of glue and glycerine and dusting a finely divided inert solid thereupon.

2. The method of preparing a fabric impervious to the vapors of petroleum oil proclucts which consists imapplying to a textile fabric a continuous coating of a mixture of glue and glycerine in the proportions of 1 part. glue to 2 parts glycerine, and dusting finely powdered talc thereupon.

3. The method of preparing a fabric impervious'to the vapors of petroleum oil products which consists in applying to a textile fabric a continuous coating of a mixture of glue and glycerine in the roportions of 1 part glue to 2 parts glvccrlne, and dusting finely powdered solid thereupon.

4. A fabric impervious to petroleum hydrocarbon vapors consisting of a textile fabric. a continuous coating of glue and glycerine. upon said fabric and a coating of adherent finely divided solid matter thereupon.

5. A fabric impervious to petroleum hvdrocarbon vapors consisting of a textile fabric, a continuous coating thereupon containing glue and glycerine in the proportions of 1 part glue to 2 parts glycerine. and a coating of adherent powdered talc thereupon.

6. A fabric impervious to petroleum hydrocarbon vapors consisting of a textile fabric, a continuous coating there-upon containing glue and glycerine in the proportions of .1 part glue to 2 parts glycerine, and a coating of adherent powdered solid thereupon.

7. A fabric impervious to petroleum hydrocarbon vapors consisting of a textile fabric havingthereupon a continuous coating containing glue and. glycerine in the proportions of 1 to 3 parts of glycerine to 1 

